Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1b29337829cc53…

MALICIOUS

PDF

77.7 KB Created: 2020-11-18 14:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: caa64887e7bf87f8c03b540a1330582a SHA-1: 01330f0fa2bba390dc5d23bd36261cb502aaa202 SHA-256: df1b29337829cc53d93d490ae33ec484c2a7edeeb5f999b68d33f73f22aaa234
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links, with one pointing to 'trafftec.ru', which is flagged as suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/strik?utm_term=mystic+messenger+route+guide PDF link annotation
    • https://sedogosep.weebly.com/uploads/1/3/4/4/134486754/xazijofewuzusu_migidobomuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5fa411c2106b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5fa973a4b7832.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/942188e5-77c2-4d74-82bd-9ae50d7be198/56678328002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b91a294-e2ab-4f21-af3a-b00d3c677470/rezojadobeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eed5fc7-cfd4-4396-aaf2-6c234a406a4e/luzevirazunuvotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ae85b2-c8d2-4565-a0af-def951d790e2/kumozafitifofefofapejino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8a53fe-9268-4ab7-ab30-ae7e01030a3d/sezotazekoduvoxuxuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbdb2267-4c05-4b5e-b8d4-debff11596eb/95067722827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54689999-9416-4acf-9037-0638fee4ed93/37214173112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb139e1-2ee8-4feb-be5f-3d469787ce66/ccna_chapter_10_exam_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb660fb9-5bed-4390-a494-d3bcc7766dec/68199413294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcde12cd-a491-4657-9e85-1afc7961d662/buvenobofuf.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 5008 bytes
SHA-256: d4e833d5df64670ab32518e5fd13c410665a3e11b92bc2baad99d793f436e36a
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 11100 bytes
SHA-256: a46a52499551d13a45316ba75663f71a29cce94a6dc2fa04b2b3710fded95a50
font_02_sfnt_off00011b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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